Leases - AR PENN Master Lease (Details) $ in Millions	Nov. 01, 2023 USD ($)	Feb. 21, 2023 USD ($) term facility	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jan. 01, 2023 USD ($)	Dec. 31, 2022 USD ($)
Lessee, Lease, Cost [Line Items]
Long-term portion of financing obligations			$ 2,364.9	$ 2,386.1
Property and equipment, net			3,498.1	$ 3,514.0
Derecognition of operating lease liabilities			$ 4,102.9
Penn Master Lease
Lessee, Lease, Cost [Line Items]
Initial rent		$ 284.1
Number of facilities with leased real estate | facility		14
Number of options to extend lease | term		3
Lease renewal term		5 years
Adjusted annual escalator percentage		2.00%
Adjusted revenue to rent ratio		1.8
Period over which fixed component is adjusted		5 years
Adjustment to fixed component as percentage of the average change to net revenues during the preceding five years		4.00%
Percentage rent baseline period		5 years
Increase of fixed component of rent	$ 4.2
Lessee, percentage rent test, component of rent decrease, amount	$ 4.4
Long-term portion of financing obligations						$ 1,600.0
Property and equipment, net						$ 1,100.0
Derecognition of operating lease liabilities					$ 1,200.0
Penn Master Lease | Building Base Rent
Lessee, Lease, Cost [Line Items]
Initial rent		$ 208.2
Penn Master Lease | Land Base Rent
Lessee, Lease, Cost [Line Items]
Initial rent		43.0
Penn Master Lease | Percentage Rent
Lessee, Lease, Cost [Line Items]
Initial rent		$ 32.9